On Mon, 2009-08-17 at 13:37 -0400, Tom Lane wrote:
> Thinking about it again, it seems to me that a much narrower patch
> could solve the specific forms of the problem that the PostGIS folk
> are seeing. Instead of trying to have a general-purpose method of
> preventing repeat de-toasting, we could just prevent it for inner
> indexscans by having ExecIndexEvalRuntimeKeys() detoast anything it's
> passing to the index AM.
With this patch, are there still situations where we should be concerned
about repeated de-toasting, or does this solve the biggest part of the
problem?
If so, is it possible that two similar plans for the same query might
perform differently due to repeated de-toasting?
Regards,Jeff Davis